26 results on '"H. A. Arjun"'
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2. Corrigendum: Design, Synthesis, and Biological Evaluation of (E)-N'-((1-Chloro-3,4-Dihydronaphthalen-2-yl)Methylene)Benzohydrazide Derivatives as Anti-prostate Cancer Agents
- Author
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H. A. Arjun, Ramakrishnan Elancheran, N. Manikandan, K. Lakshmithendral, Muthiah Ramanathan, Atanu Bhattacharjee, N. K. Lokanath, and Senthamaraikannan Kabilan
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androgen receptor ,prostate cancer ,benzohydrazide ,molecular docking ,molecular dynamics ,ADME ,Chemistry ,QD1-999 - Published
- 2019
- Full Text
- View/download PDF
3. Design, Synthesis, and Biological Evaluation of (E)-N'-((1-Chloro-3,4-Dihydronaphthalen-2-yl)Methylene)Benzohydrazide Derivatives as Anti-prostate Cancer Agents
- Author
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H. A. Arjun, Ramakrishnan Elancheran, N. Manikandan, K. Lakshmithendral, Muthiah Ramanathan, Atanu Bhattacharjee, N. K. Lokanath, and Senthamaraikannan Kabilan
- Subjects
androgen receptor ,prostate cancer ,benzohydrazide ,molecular docking ,molecular dynamics ,ADME ,Chemistry ,QD1-999 - Abstract
Prostate Cancer (PCa) is the most frequently diagnosed cancer in men in their late '50s. PCa growth is mainly due to the activation of the androgen receptor by androgens. The treatment for PCa may involve surgery, hormonal therapy, and oral chemotherapeutic drugs. A structural based molecular docking approach revealed the findings of (E)-N'-((1-chloro-3,4-dihydronaphthalen-2-yl)methylene)benzohydrazide derivatives, where the possible binding modes of the compounds with protein (PDB ID: 3V49) are shown. The compounds (6a-k) were synthesized and characterized by using conventional methods. The compounds, 6g, 6j, and 6k were reconfirmed through single crystal X-ray diffraction (XRD). Further, the compounds (6a-k) and standard drug were evaluated against human prostate cancer cell lines, LNCaP and PC-3 and the non-cancerous cell line, 3T3. Among these compounds, 6g and 6j showed higher cytotoxicity, and 6g exhibited dose-dependent activity and reduced cell viability. The mechanism of action was observed through the induced apoptosis and was further confirmed by western blot and ELISA. Molecular dynamics simulation studies were carried out to calculate the interaction and the stability of the protein-ligand complex in motion. ADME properties were predicted for all the tested compounds. These findings may give vital information for further development.
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- 2019
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- View/download PDF
4. Clinico-Epidemiological Study of Snake Bite Presenting to the Emergency Department of a Tertiary Care Hospital
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H M, Arjun, primary, Shinde, Varsha, additional, Bhattaram, Suhrith, additional, and Shaikh, Zahid, additional
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- 2023
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5. Development of Vaccines for Australia: TGA Regulations and Approval process
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H. R., Arjun, primary and Venkatesh, M. P., additional
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- 2023
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6. Regulations for Testing and Licensing of Vaccines in United Kingdom
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M. P. Venkatesh, H. R. Arjun, and M. Ranjitha
- Abstract
Vaccines are one of the most significant achievements of science and public health for prevention of infectious disease. Overall vaccination policies for HCP in should be periodically revaluated in order to provide optimal protection against vaccine preventable diseases and infection control with in healthcare. The guidelines address ethical issues that arise during a vaccine study. A network of Adverse Drug Reaction (ADR) monitoring centre alone with adverse event following immunisation (AEFI) provide the machinery for vaccine pharmacovigilance.
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- 2022
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7. Type3c Diabetes Mellitus.
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H. R., Arjun, Halagali, Praveen, Tausif, Mohammed, J., Vaishnavi, U. R., Rakshith, and Rakshanaa, G. S.
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DIABETES , *PANCREATIC diseases , *MEDICAL personnel , *CYSTIC fibrosis , *CHRONIC pancreatitis , *PANCREATIC duct , *PANCREAS , *HYPERGLYCEMIA - Abstract
Diabetes type 3C is referred to as pancreatogenic diabetes also, which is occurring due to pancreatic cancer, pancreatitis, cystic fibrosis, and also pancreatic disease. In this condition, there is an inconsistent blow from hypoglycemia to hyperglycemia, which occurs due to metabolic abnormalities due to tissue damage in the pancreas. Henceforth, the diagnosis and management of this rare condition is a challenging task for healthcare providers. A group from Germany named Ewald and colleagues has observed that among diabetes patients, 8% of patients suffer from T3cDM having chronic pancreatitis, and the occurrence range varies from 5-8%. Type 3cDM incidence is more in patients with surgical resection, especially in the distal pancreas, the presence of pancreatic calcifications and they are on the verge of developing DM in chronic pancreatitis. Pancreatogenous DM is defined as the development of diabetes mellitus in patients due to exocrine pancreas disease, according to recent literature it’s been referred to as type c diabetes. Due to heterogeneity, DM is presently comprised of four types. (1 to 4), depending upon the consumption of tobacco, and often it’s linked with alcohol-abusing which is considered to be a predisposition factor in the disorders related to the pancreas. Diabetes type 3C is referred to as pancreatogenic diabetes also, which is occurring due to pancreatic cancer, pancreatitis, cystic fibrosis, and also pancreatic disease. In this condition, there is an inconsistent blow from hypoglycemia to hyperglycemia, which occurs due to metabolic abnormalities due to tissue damage in the pancreas. Henceforth, the diagnosis and management of this rare condition is a challenging task for healthcare providers.Diabetes type 3C is referred to as pancreatogenic diabetes also, which is occurring due to pancreatic cancer, pancreatitis, cystic fibrosis, and also pancreatic disease. In this condition, there is an inconsistent blow from hypoglycemia to hyperglycemia, which occurs due to metabolic abnormalities due to tissue damage in the pancreas. Henceforth, the diagnosis and management of this rare condition is a challenging task for healthcare providers. A group from Germany named Ewald and colleagues has observed that among diabetes patients, 8% of patients suffer from T3cDM having chronic pancreatitis, and the occurrence range varies from 5-8%. Type 3cDM incidence is more in patients with surgical resection, especially in the distal pancreas, the presence of pancreatic calcifications and they are on the verge of developing DM in chronic pancreatitis. Pancreatogenous DM is defined as the development of diabetes mellitus in patients due to exocrine pancreas disease, according to recent literature it’s been referred to as type c diabetes. Due to heterogeneity, DM is presently comprised of four types. (1 to 4), depending upon the consumption of tobacco, and often it’s linked with alcohol-abusing which is considered to be a predisposition factor in the disorders related to the pancreas. Diabetes type 3C is referred to as pancreatogenic diabetes also, which is occurring due to pancreatic cancer, pancreatitis, cystic fibrosis, and also pancreatic disease. In this condition, there is an inconsistent blow from hypoglycemia to hyperglycemia, which occurs due to metabolic abnormalities due to tissue damage in the pancreas. Henceforth, the diagnosis and management of this rare condition is a challenging task for healthcare providers. [ABSTRACT FROM AUTHOR]
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- 2023
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8. Role of Stem Cells in the Management of Type-I Diabetes Mellitus.
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H. R., Arjun, Halagali, Praveen, Tausi, Y. Mohammed, Paramakrishnan, N., and Rakshith, U. R.
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STEM cells ,DIABETES ,HUMAN stem cells ,STEM cell treatment ,STANDARD of living ,PLURIPOTENT stem cells - Abstract
The paper aims to accent Type-1 DM along with its etiology, pathophysiology, and treatment in this review. Diabetes is considered the chronic ailment of hypoglycemia ensuing from the duo of the dearth of insulin action and secretion of insulin considered as both. Moreover, Type-1 is a result of autoimmune of the cells of islets of the pancreas. The confrontation to the insulin or secretion of insulin lacking due to changes in living standards, habit change, dearth of exercise along with aging also, but one of the most relevant and prevalent reasons is a lifestyle change and also change in food habits along with the stress of the day-to-day life. Stem cell therapy is an expensive treatment and obtaining stem cells also is difficult due to ethical issues and availability is also less. Presently accessible ailment for type-1 is insulin supply therapy but it is also associated with many hitches. Advanced replacements like islets have demonstrated fruitful results in reinstating glucose levels. Moreover, in severe type 1-DMM and it has been delimited due to its high cost, not economic process, shortfall of donors, etc. Replacement of beta-like cells that are obtained from differentiation of human Pluripotent Stem Cells (hPSCs) also exhibited results with flying colors and gained the spotlight, but in stem cell therapy getting beta cells along with complete insulin secretion is decisive. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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9. Arthrobacter Strains from Industrial Polluted Soil and its Oxidative Potential of Choline Oxidase Gene
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Prashant Gaur, H. M. Arjun, S. Lokesha, Sonia Gaur, P. S. S. Ganapathy, and Y. S. R. Kumar
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arthrobacter ,biology ,Chemistry ,Gram-positive bacteria ,Oxidative phosphorylation ,Choline oxidase ,blast ,snapping division ,Ribosomal RNA ,biology.organism_classification ,Applied Microbiology and Biotechnology ,Microbiology ,QR1-502 ,chemistry.chemical_compound ,reineckate ,Betaine ,Biochemistry ,Catalase ,Arthrobacter ,biology.protein ,Choline ,betaine ,pleomorphic ,Biotechnology - Abstract
Betaine is a trimethylglycine, serves as osmoregulator to prevent dehydration and plasmolysis under adverse hyperosmotic environments. Choline oxidase gene from Arthrobacter sp. catalyzes two step oxidation reaction of choline to betaine followed by betaine accumulation in cells which in turn help them to survive and thrive in harsh environmental condition. To identify potential choline oxidase gene source, a gram stain positive, rod shaped, catalase and oxidase positive, motile, aerobic bacterial strains designated as HYJE003 and HYJE005 was isolated based on the colony morphology, biochemical and molecular characterization from the industrially polluted soil samples of Hyderabad, India. Optimum growth of the isolated strains was observed at 32°C on nutrient agar media and was found that both the strains were capable of utilizing variety of sugars as carbon source. The 16S rRNA gene sequence analysis revealed that strain HYJE003 was closely related to Arthrobacter globiformis with pairwise sequence similarities of 99.85%, 99.63%, 98.76% and 98.12% respectively. The strain HYJE005 was closely related to Arthrobacter phenanthrenivorans with pairwise sequence similarities of 99.93%, 99.47%, 99.25% and 98.11% respectively. Choline oxidase gene potential of the isolates was studied by feeding the cultures with choline chloride and converted betaine was assessed by the formation of betaine reineckate. Findings revealed that the isolated strain Arthrobacter globiformis-HYJE003 has four times higher conversion rate of choline chloride to betaine than the strain Arthrobacter phenanthrenivorans HYJE005.
- Published
- 2019
10. Microwave-Assisted Synthesis of Graphene/MnO2 Nanocomposites for High Performance Electrochemical Supercapacitors
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G. Manikandan, H. A. Arjun, and R. Anantha
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Computational Mathematics ,Materials science ,Nanocomposite ,Graphene ,law ,Electrochemical supercapacitors ,General Materials Science ,Nanotechnology ,General Chemistry ,Electrical and Electronic Engineering ,Condensed Matter Physics ,Microwave assisted ,law.invention - Published
- 2019
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11. Production of recombinant choline oxidase and its application in betaine production
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Prashant Gaur, H. M. Arjun, S. Lokesha, P S Sujan Ganapathy, and Y.S. Ravi Kumar
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chemistry.chemical_classification ,biology ,Choline oxidase ,Environmental Science (miscellaneous) ,Agricultural and Biological Sciences (miscellaneous) ,Enzyme assay ,chemistry.chemical_compound ,Betaine ,Enzyme ,chemistry ,Biochemistry ,Osmolyte ,Glycine ,biology.protein ,Choline ,Original Article ,Biotechnology ,Choline chloride - Abstract
Choline oxidase catalyzes the oxidation of choline to glycine betaine via betaine aldehyde in glycine betaine biosynthesis and betaine acts as an osmolyte. Choline oxidase has attracted a great deal of attention because of its wide application in clinical and its potential use in enzymatic betaine production. Therefore, the development of efficient methods for overexpression of choline oxidase will be very valuable. In the present study, the choline oxidase gene was amplified from a newly isolated Gram-positive soil Arthrobacter globiformis strain HYJE003 and was cloned into a pET expression vector. Furthermore, the culture conditions were optimized for overexpression of cloned choline oxidase gene in different hosts for periplasmic expression of the enzyme. Expression host system Rosetta-gami2(DE3)pLysS yielded more cell-free protein and 20 fold higher active enzyme compared to any other reported studies. Terrific Broth media were found to be yielding the highest cell biomass, by applying the optimized culture conditions and purification strategy 20,902 U of choline oxidase was produced with a specific activity of 95 U/mg. The optimum pH and temperature for the enzyme activity were found to be 7 and 37 °C, respectively. Finally, we have demonstrated efficient bioconversion of betaine using overexpressed and purified choline oxidase enzyme. The enzymatically produced betaine was estimated by the formation of betaine reineckate and we were able to produce 0.83 molar of betaine from one molar of choline chloride. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s13205-021-02960-z.
- Published
- 2021
12. Alkali-activated concrete paver blocks made with recycled asphalt pavement (RAP) aggregates
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Hossiney, Nabil, Sepuri, Hima Kiran, Mohan, Mothi Krishna, H R, Arjun, Govindaraju, Santhosh, and Chyne, Jorisa
- Published
- 2020
- Full Text
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13. Geopolymer Bricks Using Iron Ore Tailings, Slag Sand, Ground Granular Blast Furnace Slag and Fly Ash
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Raghunandan Kumar, Pranab Das, M. Beulah, and H. R. Arjun
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Metallurgy ,InformationSystems_INFORMATIONSTORAGEANDRETRIEVAL ,Slag ,engineering.material ,Tailings ,Geopolymer ,Iron ore ,Ground granulated blast-furnace slag ,Fly ash ,visual_art ,visual_art.visual_art_medium ,engineering ,Data_FILES ,Environmental science ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) - Published
- 2020
14. In vitro and in silico inhibition properties of fucoidan against α-amylase and α-D-glucosidase with relevance to type 2 diabetes mellitus
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Chandrasekaran Raghu, H A Arjun, S. Lakshmana Senthil, and P Anantharaman
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Polymers and Plastics ,Protein Conformation ,In silico ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Fucose ,chemistry.chemical_compound ,Structure-Activity Relationship ,Pharmacokinetics ,Polysaccharides ,Materials Chemistry ,Computer Simulation ,Glycoside Hydrolase Inhibitors ,Amylase ,IC50 ,biology ,Chemistry ,Fucoidan ,Organic Chemistry ,alpha-Glucosidases ,021001 nanoscience & nanotechnology ,In vitro ,0104 chemical sciences ,Molecular Docking Simulation ,Biochemistry ,Diabetes Mellitus, Type 2 ,Docking (molecular) ,biology.protein ,alpha-Amylases ,0210 nano-technology - Abstract
This study investigated the in vitro and in silico inhibitory properties of fucoidan extracted from Turbinaria conoides against α-amylase and α-D-glucosidase. Extracted fucoidan contained 59 and 35% of fucose and sulphate and was characterized using 1H NMR. Dose dependent inhibition assays showed maximum of 85 and 72% of inhibition for α-amylase and α-D-glucosidase at 2.07 and 1.03 μM concentration of fucoidan. The IC50 value of fucoidan was found to be 1.07 and 0.68 μM against α-amylase and α-D-glucosidase. In silico studies (grid based docking) by Schrodinger software revealed that fucoidan as a potent inhibitor for both α-amylase and α-D-glucosidase based on number of interactions, hydrogen bond length and binding energy. Furthermore, fucoidan fulfilled the pharmacokinetic properties thus promising to develop fucoidan as drug for type 2 DM.
- Published
- 2018
15. Study of clinical profile of the patients presenting with acute Cerebrovascular accident to the emergency medicine.
- Author
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Patil, Sonali, Shinde, Varsha S., Khuraijam, Sweta, Gangurde, Alok, Luthra, Avinav, H. M., Arjun, Bhattaram, Suhrith, Puthoor, Anjeeth, Reddy, Dhruva Kumar, and Shaikh, Zahid
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TRAUMATOLOGY ,STROKE ,EMERGENCY medicine ,GLASGOW Coma Scale ,LOW-income countries - Abstract
Introduction: Stroke involves an acute insult to the brain and is a major disabling disease. Globally, stroke is the second leading cause of death. Stroke has become an important cause of premature mortality and morbidity in low-income and middle-income countries like India, which are largely driven by demographic changes and enhanced by the increasing prevalence of the key modifiable risk factors. Material and Methods: It was a prospective observational study, was carried out on patients in the Emergency Medicine department at Dr. D. Y. Patil Medical college, Hospital & Research Centre, Pimpri, Pune. CVA cases confirmed on CT/MRI brain and admitted in emergency medicine within 48 hours of onset of stroke fulfilling inclusion and exclusion criteria were enrolled as study subjects. Detailed history, clinical examination and relevant laboratory investigation were carried out as per the proforma. Results and conclusion: Maximum 65.8% had no facial deviation while 20% had right and 14.3% had left facial deviation. More than two third (77.1%) had one side body weakness and 17.1% had no weakness of either side. Maximum (41.4%) had right sided weakness, 34.3% had left side weakness and 22.9% had no upper limb weakness. Maximum (38.6%) had right sided weakness, 34.3% had left side weakness and 25.7% had no lower limb weakness. Glasgow Coma Scale (GCS) score -Most of the subjects (94.3%) had score >8 and very few 5.7% had score =8. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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16. DC-DC buck converter through duality approach for current based loads
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Mahajan Sagar Bhaskar Ranjana, S. M. Mule, Rishi M. Kulkarni, and H. Kardile Arjun
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Forward converter ,020301 aerospace & aeronautics ,Switched-mode power supply ,Buck converter ,Flyback converter ,Computer science ,020208 electrical & electronic engineering ,Ćuk converter ,Buck–boost converter ,02 engineering and technology ,Current source ,0203 mechanical engineering ,Boost converter ,0202 electrical engineering, electronic engineering, information engineering ,Electronic engineering - Abstract
This paper presents a DC-DC buck converter through duality approach. In switched mode power supply (SMPS), buck converters are predominant parts. To control output quantity at output end, these converters are attached after rectifiers. There are some applications in which current source is available and there is need of output current control as most of SMPS applications have low current ratings. So to meet this requirement the dual of voltage buck converter i.e. current buck converter is proposed. The converter also finds applications to power up current-based loads such as light-emitting diode. In this paper, the steps required for formation of dual network of buck converter are also discussed. The mathematical analysis of the conversion ratio is also discussed. The simulation of the proposed converter is done using MATLAB. The results provide the verification of the mathematical equations of current buck converter and duality principle.
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- 2016
- Full Text
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17. Reliability of clinical methods in evaluating patellofemoral pain syndrome with malalignment
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R. H. H., Arjun, primary, Kishan, Rama, additional, M. S., Dhillon, additional, and Chouhan, Devender, additional
- Published
- 2017
- Full Text
- View/download PDF
18. Arthrobacter Strains from Industrial Polluted Soil and its Oxidative Potential of Choline Oxidase Gene.
- Author
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S., Lokesha, Y. S., Ravi Kumar, Gaur, Sonia, P. S., Sujan Ganapathy, H. M., Arjun, and Gaur, Prashant
- Subjects
BETAINE ,MOUNTAIN soils ,CATALASE ,ARTHROBACTER ,CHOLINE chloride ,CHOLINE ,GRAM'S stain ,SOIL sampling - Abstract
Betaine is a trimethylglycine, serves as osmoregulator to prevent dehydration and plasmolysis under adverse hyperosmotic environments. Choline oxidase gene from Arthrobacter sp. catalyzes two step oxidation reaction of choline to betaine followed by betaine accumulation in cells which in turn help them to survive and thrive in harsh environmental condition. To identify potential choline oxidase gene source, a gram stain positive, rod shaped, catalase and oxidase positive, motile, aerobic bacterial strains designated as HYJE003 and HYJE005 was isolated based on the colony morphology, biochemical and molecular characterization from the industrially polluted soil samples of Hyderabad, India. Optimum growth of the isolated strains was observed at 32°C on nutrient agar media and was found that both the strains were capable of utilizing variety of sugars as carbon source. The 16S rRNA gene sequence analysis revealed that strain HYJE003 was closely related to Arthrobacter globiformis with pairwise sequence similarities of 99.85%, 99.63%, 98.76% and 98.12% respectively. The strain HYJE005 was closely related to Arthrobacter phenanthrenivorans with pairwise sequence similarities of 99.93%, 99.47%, 99.25% and 98.11% respectively. Choline oxidase gene potential of the isolates was studied by feeding the cultures with choline chloride and converted betaine was assessed by the formation of betaine reineckate. Findings revealed that the isolated strain Arthrobacter globiformis-HYJE003 has four times higher conversion rate of choline chloride to betaine than the strain Arthrobacter phenanthrenivorans HYJE005. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
19. Reliability of clinical methods in evaluating patellofemoral pain syndrome with malalignment
- Author
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Rama Kishan, Mandeep S Dhillon, Devender Chouhan, and R H H Arjun
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Clinical tests ,medicine.medical_specialty ,Pain syndrome ,Patellar apprehension test ,business.industry ,Anterior knee pain ,0206 medical engineering ,02 engineering and technology ,medicine.disease ,020601 biomedical engineering ,Clinical method ,03 medical and health sciences ,0302 clinical medicine ,Radiological weapon ,Physical therapy ,Medicine ,business ,030217 neurology & neurosurgery ,Patellofemoral pain syndrome ,Reliability (statistics) - Abstract
Background: Diagnosis of patellofemroal pain syndrome has been challenging due to lack of clinical test with better sensitivity and specificity, axial imaging has been considered as the standard modality for evaluation. Patients with anterior knee pain because of patellofemoral pain syndrome can be sub-grouped as those with or without radiological positive parameter for patellar maltracking. The aim of the present study was to evaluate reliability of clinical tests in two subgroups of patients presenting with patellofemoral pain syndrome.Methods: 45 knees with anterior knee pain without any episode of patellar instability were evaluated clinically using four standard tests (patellar apprehension test (PAT), eccentric step test (EST), active instability test (AIT) and Waldron’s test. On the basis of CT scan finding (at least one positive radiological parameter of instability) 28 knees were categorized in Group A (potential patellar instability group) and 17 knees in Group B (PFPS).Results: All patients with 3 or more than three clinical test positive were cases with potential patellofemroal instability except two. Whereas other true patellofemroal pain patients all except 2 were have less than 3 positive clinical tests. Conclusions: Clinical test have more diagnostic accuracy in evaluating anterior knee pain due to potential patellofemroal instability in comparison to patellofemroal pain without radiological instability.
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- 2017
- Full Text
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20. Clear cell chondrosarcoma calcaneum - a case report and review of literature
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Gochhait Debasis, Patel Sandeep, R H H Arjun, Aggarwal Aditya, John Rakesh, and Singh Nagmani
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Male ,medicine.medical_specialty ,medicine.diagnostic_test ,business.industry ,medicine.medical_treatment ,Chondrosarcoma ,Bone Neoplasms ,Bone Sarcoma ,Middle Aged ,medicine.disease ,Malignancy ,Amputation, Surgical ,Surgery ,Calcaneus ,Primary bone ,Amputation ,Biopsy ,Medicine ,Humans ,Orthopedics and Sports Medicine ,Podiatry ,business ,Clear cell - Abstract
Chondrosarcoma is the second most common primary bone malignancy accounting for 20-25% of all bone sarcomas. However chondrosarcoma of the foot is rare with just a handful of cases being described. Among the subtypes clear cell variant is the rarest and has never been documented in the foot. We present a rare case of clear cell chondrosarcoma of the calcaneum with multiple metastases that was treated at our institute. The patient was a 62-year old male who presented to us with pain and mass in the left hindfoot with difficulty in walking for 2 years and a discharging ulcer over the lateral aspect for 4 months. Radiography showed aggressive, destructive, lytic lesion in the calcaneum with cortical breach and soft tissue invasion. Bone scan and PET-CT revealed multiple bony metastases and lung metastasis. After initial biopsy, patient underwent below knee amputation and has been in remission since the last 18 months. Given the rarity of this tumor in the calcaneum, this report highlights the importance to consider the possibility of this tumor in the calcaneum as an early diagnosis; complete metastatic workup and expeditious management can thus significantly improve prognosis.
- Published
- 2014
21. Nutritional Evaluation of Whole and Lipid-Extracted Biomass of the Microalga Scenedesmus sp. AMDD Isolated in Saskatchewan, Canada for Animal Feeds: Proximate, Amino Acid, Fatty Acid, Carotenoid and Elemental Composition
- Author
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M. Tibbetts, Sean, primary, J. Melanson, Ronald, additional, C. Park, Kyoung, additional, H. Banskota, Arjun, additional, Stefanova, Roumiana, additional, and J. McGinn, Patrick, additional
- Published
- 2016
- Full Text
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22. Efficacy of Epidural Perineural Injection of Autologous Conditioned Serum in Unilateral Cervical Radiculopathy
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Goni, Vijay G., primary, Singh Jhala, Sampat, additional, Gopinathan, Nirmal Raj, additional, Behera, Prateek, additional, Batra, Y. K., additional, R. H. H., Arjun, additional, Guled, Uday, additional, and Vardhan, Harsha, additional
- Published
- 2015
- Full Text
- View/download PDF
23. Solving City Routing Issue with Particle Swarm Optimization
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K.Hadia, Sarman, primary, H. Joshi, Arjun, primary, K. Patel, Chaitalee, primary, and P Kosta, Yogesh, primary
- Published
- 2012
- Full Text
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24. Nutritional Evaluation of Whole and Lipid-Extracted Biomass of the Microalga Scenedesmus sp. AMDD Isolated in Saskatchewan, Canada for Animal Feeds: Proximate, Amino Acid, Fatty Acid, Carotenoid and Elemental Composition
- Author
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M. Tibbetts, Sean, J. Melanson, Ronald, C. Park, Kyoung, H. Banskota, Arjun, Stefanova, Roumiana, and J. McGinn, Patrick
- Abstract
Background: While a major driver for technological innovation, microalgae-based biofuels remain economically non-viable. However, as microalgae cultivation continues to scale-up to industrial production levels, algal biorefinery strategies must emerge in order to effectively valorize the biomass (crop) and help stabilize the economic viability of a microalgae-based industry. Of the numerous potential markets for microalgae (co) products, the animal nutrition and aquaculture sectors may be highly promising areas to focus for generating revenues. The aim of this paper was to generate novel primary chemical and biochemical composition data on whole and lipid-extracted algal biomass produced from a proprietary freshwater strain of Scenedesmus sp. AMDD. Methods: Scenedesmus sp. AMDD biomass was produced in a 'Brite-Box' photobioreactor and half was lipid-extracted by automated Soxhlet solvent extraction. Using established and new methods, both fractions were characterized for their chemical and biochemical composition including proximate, amino acid, fatty acid, carotenoid and elemental composition. The data are discussed with an emphasis towards their application to terrestrial livestock and aquaculture feeds. Results: Under the particular cultivation conditions employed in this study, Scenedesmus sp. AMDD had a growth rate of 0.8±0.1 d-1, biomass production of 0.4±0.0 g DW L-1 and daily productivity of 40.0±2.9 mg DW L-1 d-1. On a DW basis, whole algal biomass (WAB) contained low ash (3%), moderate protein (32-35%), esterifiable lipid (11-13%) and starch (8-9%), high total carbohydrate (35-38%), fibre (26-29%) and energy (23 MJ kg-1). Lipid-extracted biomass (LEB) contained higher protein (40- 44%), total carbohydrate (40-48%), starch (10-12%) and fibre (30-35%) and lower residual esterifiable lipid (<1%) and energy (20 MJ kg-1). Scenedesmus sp. AMDD protein had favorable amino acid profiles with high essential amino acid indices (0.9-1.0); was rich in first-limiting essential amino acids lysine (1.8-2.3%), methionine (0.7-1.0%) and tryptophan (0.2-0.7%). Algal lipid (% of total fatty acids) was predominantly composed of polyunsaturated fatty acids (PUFA, 45-52%), high in monounsaturated fatty acids (MUFA, 31-38%) and low in saturated fatty acids (SFA, 16%). Scenedesmus sp. AMDD lipid was particularly rich in ?-linolenic acid (18:3n-3; 18-23%), total n-3 PUFA (30-38%) and lower in total n-6 PUFA (13-15%); which resulted in attractive n-3:n-6 ratios (2-3:1). Scenedesmus sp. AMDD biomass was rich in potassium (0.6-0.7%), phosphorous (0.5-0.7%), iron (1081- 1777 mg kg-1) and lutein (0.3% [WAB only]) and was virtually absent of contaminating heavy metals. A species-specific nitrogen-to-protein conversion factor of Nx5.55 was validated for use with Scenedesmus sp. AMDD harvested during exponential growth phase. Conclusion: Due to its relatively high contents of protein (32-44%) and carbohydrate (35-48%), Scenedesmus sp. AMDD biomass could be considered a protein-rich algal meal with a market value similar to those produced from terrestrial oilseed crops such as soy, canola and corn. However, the carbohydrate fraction contained low levels of starch (23-26% of total carbohydrate) and a high proportion of fibre (74-77% of total carbohydrate). As a result, relatively unprocessed Scenedesmus sp. AMDD biomass may not be well digested by monogastric animals and may be better suited for ruminant animals that have a higher capacity for digestion of cellulosic materials. In order to enter the higher-value monogastric animal feed sector, the biomass would likely need to be upgraded to produce algal protein concentrates (APCs) with higher protein levels, concomitant with reduced total carbohydrate and fibre levels. In vitro investigations are currently underway to evaluate Scenedesmus sp. AMDD biomass for nutrient digestibility, metabolizable energy content, ruminal gas production, enteric methane abatement potential, ruminal fatty acid biohydrogenation and assessment for potential consumption risk by monogastric and ruminant animals.
- Published
- 2015
25. Biosynthesis of Diazepinomicin/ECO-4601, a MicromonosporaSecondary Metabolite with a Novel Ring System
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B. McAlpine, James, T. Carter, Guy, H. Banskota, Arjun, D. Charan, Romila, Schlingmann, Gerhard, Zazopoulos, Emmanuel, Piraee, Mahmood, Janso, Jeffrey, S. Bernan, Valerie, Aouidate, Mustapha, M. Farnet, Chris, Feng, Xidong, and Zhao, Zhizi
- Abstract
The novel microbial metabolite diazepinomicin/ECO-4601 ( 1) has a unique tricyclic dibenzodiazepinone core, which was unprecedented among microbial metabolites. Labeled feeding experiments indicated that the carbocyclic ring and the ring nitrogen of tryptophan could be incorporated via degradation to the 3-hydroxyanthranilic acid, forming ring A and the nonamide nitrogen of 1. Genomic analysis of the biosynthetic locus indicated that the farnesyl side chain was mevalonate derived, the 3-hydroxyanthranilic acid moiety could be formed directly from chorismate, and the third ring was constructed via 3-amino-5-hydroxybenzoic acid. Successful incorporation of 4,6-D 2-3-hydroxyanthranilic acid into ring A of 1via feeding experiments supports the genetic analysis and the allocation of the locus to this biosynthesis. These studies highlight the enzymatic complexity needed to produce this structural type, which is rare in nature.
- Published
- 2008
- Full Text
- View/download PDF
26. In vitro and in silico inhibition properties of fucoidan against α-amylase and α-D-glucosidase with relevance to type 2 diabetes mellitus.
- Author
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S LS, Raghu C, H A A, and P A
- Subjects
- Glycoside Hydrolase Inhibitors chemistry, Glycoside Hydrolase Inhibitors metabolism, Molecular Docking Simulation, Polysaccharides chemistry, Polysaccharides metabolism, Protein Conformation, Structure-Activity Relationship, alpha-Amylases chemistry, alpha-Amylases metabolism, alpha-Glucosidases chemistry, Computer Simulation, Diabetes Mellitus, Type 2 enzymology, Glycoside Hydrolase Inhibitors pharmacology, Polysaccharides pharmacology, alpha-Amylases antagonists & inhibitors, alpha-Glucosidases metabolism
- Abstract
This study investigated the in vitro and in silico inhibitory properties of fucoidan extracted from Turbinaria conoides against α-amylase and α-D-glucosidase. Extracted fucoidan contained 59 and 35% of fucose and sulphate and was characterized using
1 H NMR. Dose dependent inhibition assays showed maximum of 85 and 72% of inhibition for α-amylase and α-D-glucosidase at 2.07 and 1.03 μM concentration of fucoidan. The IC50 value of fucoidan was found to be 1.07 and 0.68 μM against α-amylase and α-D-glucosidase. In silico studies (grid based docking) by Schrödinger software revealed that fucoidan as a potent inhibitor for both α-amylase and α-D-glucosidase based on number of interactions, hydrogen bond length and binding energy. Furthermore, fucoidan fulfilled the pharmacokinetic properties thus promising to develop fucoidan as drug for type 2 DM., (Copyright © 2019 Elsevier Ltd. All rights reserved.)- Published
- 2019
- Full Text
- View/download PDF
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